TY  - BOOK
AU  - Tivy,Joy
AU  - O'Hare,Greg
TI  - Human impact on the ecosystem
SN  - 0050034243 :
AV  - GF75 .T58 1982
U1  - 304.2 19
PY  - 1982///
CY  - Edinburgh, New York
PB  - Oliver & Boyd
KW  - Nature
KW  - Effect of human beings on
KW  - Human ecology
N1  - Includes bibliographies and index
ER  -